Comparison of methods for conducting laboratory proficiency surveys.
D001322:Autoanalysis; D001663:Bilirubin / Q000032:analysis; D001786:Blood Glucose; D001798:Blood Proteins; D001806:Blood Urea Nitrogen; D002784:Cholesterol / Q000097:blood; D019411:Clinical Laboratory Techniques / Q000592:standards; D006748:Hospital Departments; D006801:Humans; D007087:Illinois; D007753:Laboratories / Q000592:standards*; D008722:Methods; D011517:Prothrombin Time; D013223:Statistics as Topic; D000078329:Workforce
D001786:Blood Glucose; D001798:Blood Proteins; D002784:Cholesterol; D001663:Bilirubin